function form1_Validator(f)
{
  // Username
  if (5 > f.elements['username'].value.length)
  {
    alert("Your Username must be between 5 to 15 Letters and Numbers.");
    f.elements['username'].focus();
    return(false);
  }
  else if (f.elements['username'].value.length > 15)
  {
    alert("Your Username must be between 5 to 15 Letters and Numbers.");
    f.elements['username'].focus();
    return(false);
  }
  if (window.RegExp)
  {
    var reg = new RegExp("^[0-9a-zA-Z]*$","g");
    if (!reg.test(f.elements['username'].value))
    {
      alert("Your Username can contain only letters and numbers");
      f.elements['username'].focus();
      return(false);
    }
  }

  // Password
  if (5 > f.elements['password1'].value.length)
  {
    alert("Your Password must be between 5 to 10 Letters and Numbers.");
    f.elements['password1'].focus();
    return(false);
  }
  else if (f.elements['password1'].value.length > 10)
  {
    alert("Your Password must be between 5 to 10 Letters and Numbers.");
    f.elements['password1'].focus();
    return(false);
  }
  if (window.RegExp)
  {
    var reg = new RegExp("^[0-9a-zA-Z]*$","g");
    if (!reg.test(f.elements['password1'].value))
    {
      alert("The Password field may only contain Letters and Numbers.");
      f.elements['password1'].focus();
      return(false);
    }
  }

  // Verify password
  if (5 > f.elements['password2'].value.length)
  {
    alert("Your Password must be between 5 to 10 Letters and Numbers.");
    f.elements['password2'].focus();
    return(false);
  }
  else if (f.elements['password2'].value.length > 10)
  {
    alert("Your Password must be between 5 to 10 Letters and Numbers.");
    f.elements['password2'].focus();
    return(false);
  }
  if (window.RegExp)
  {
    var reg = new RegExp("^[0-9a-zA-Z]*$","g");
    if (!reg.test(f.elements['password2'].value))
    {
      alert("The Password field may only contain Letters and Numbers.");
      f.elements['password2'].focus();
      return(false);
    }
  }

  // First name
  if (1 > f.elements['firstname'].value.length)
  {
    alert("The First Name field must be between 1 and 20 characters.");
    f.elements['firstname'].focus();
    return(false);
  }
  else if (f.elements['firstname'].value.length > 20)
  {
    alert("The First Name field must be between 1 and 20 characters.");
    f.elements['firstname'].focus();
    return(false);
  }
  if (window.RegExp)
  {
    var reg = new RegExp("^[^0-9]*$","g");
    if (!reg.test(f.elements['firstname'].value))
    {
      alert("The First Name field may only contain Letters.");
      f.elements['firstname'].focus();
      return(false);
    }
  }

  // Last name
  if (1 > f.elements['lastname'].value.length)
  {
    alert("The Last Name field must be between 1 and 20 characters.");
    f.elements['lastname'].focus();
    return(false);
  }
  else if (f.elements['lastname'].value.length > 20)
  {
    alert("The Last Name field must be between 1 and 20 characters.");
    f.elements['lastname'].focus();
    return(false);
  }
  if (window.RegExp)
  {
    var reg = new RegExp("^[^0-9]*$","g");
    if (!reg.test(f.elements['lastname'].value))
    {
      alert("The Last Name field may only contain Letters.");
      f.elements['lastname'].focus();
      return(false);
    }
  }

  // Company
  if (window.RegExp)
  {
    var reg = new RegExp("[a-zA-Z]","g");
    if (!reg.test(f.elements['company'].value))
    {
      alert("Your company name must be filled in.");
      f.elements['company'].focus();
      return(false);
    }
  }

  // Occupation
  if (window.RegExp)
  {
    var reg = new RegExp("[a-zA-Z]","g");
    if (!reg.test(f.elements['occupation'].value))
    {
      alert("You must describe your occupation.");
      f.elements['occupation'].focus();
      return(false);
    }
  }

  // Address
  if (2 > f.elements['address'].value.length)
  {
    alert("The Address field must be between 2 and 100 characters.");
    f.elements['address'].focus();
    return(false);
  }
  else if (f.elements['address'].value.length > 100)
  {
    alert("The Address field must be between 2 and 100 characters.");
    f.elements['address'].focus();
    return(false);
  }

  // City
  if (2 > f.elements['city'].value.length)
  {
    alert("The City field must be between 2 and 20 characters.");
    f.elements['city'].focus();
    return(false);
  }
  else if (f.elements['city'].value.length > 20)
  {
    alert("The City field must be between 2 and 20 characters.");
    f.elements['city'].focus();
    return(false);
  }

  // State
  if (f.elements['state'].value.length > 20)
  {
    alert("The Bank State field must be less then 20 characters.");
    f.elements['state'].focus();
    return(false);
  }

  // Zip code
  if (1 > f.elements['zip'].value.length)
  {
    alert("The ZIP Code field must be between 1 and 10 characters.");
    f.elements['zip'].focus();
    return(false);
  }
  else if (f.elements['zip'].value.length > 10)
  {
    alert("The ZIP Code field must be between 1 and 10 characters.");
    f.elements['zip'].focus();
    return(false);
  }

  // E-mail address
  if (f.elements['email'].value.length > 100)
  {
    alert("The Email Address field must be less then 100 characters.");
    f.elements['email'].focus();
    return(false);
  }
  if (window.RegExp)
  {
    var reg = new RegExp("^[^@]+@[^@\.]+(\.[^@\.]+)+$","g");
    if (!reg.test(f.elements['email'].value))
    {
      alert("Please enter a valid Email Address.");
      f.elements['email'].focus();
      return(false);
    }
  }

  // Country
  if (1 > f.elements['country'].value.length)
  {
    alert("The Country field must be between 1 and 30 characters.");
    f.elements['country'].focus();
    return(false);
  }
  else if (f.elements['country'].value.length > 30)
  {
    alert("The Country field must be between 1 and 30 characters.");
    f.elements['country'].focus();
    return(false);
  }
  if (window.RegExp)
  {
    var reg = new RegExp(".","g");
    if (!reg.test(f.elements['country'].value))
    {
      alert("You must select your country.");
      f.elements['country'].focus();
      return(false);
    }
  }

  // Fax
  if (f.elements['fax'].value.length > 20)
  {
    alert("The Fax Number field can not be more than 20 characters.");
    f.elements['fax'].focus();
    return(false);
  }

  // Phone
  if (4 > f.elements['phone'].value.length)
  {
    alert("The Phone Number field must be between 4 and 20 characters.");
    f.elements['phone'].focus();
    return(false);
  }
  else if (f.elements['phone'].value.length > 20)
  {
    alert("The Phone Number field must be between 4 and 20 characters.");
    f.elements['phone'].focus();
    return(false);
  }
  if (window.RegExp)
  {
    var reg = new RegExp("[0-9].*[0-9].*[0-9].*[0-9]","g");
    if (!reg.test(f.elements['phone'].value))
    {
      alert("The Phone Number field must have 4 or more Numbers.");
      f.elements['phone'].focus();
      return(false);
    }
  }

  // Unique visitors per day
  if (window.RegExp && f.elements['visitors'])
  {
    var reg = new RegExp("[0-9]","g");
    if (!reg.test(f.elements['visitors'].value))
    {
      alert("You should give an approximate number of visitors your web page has every day.");
      f.elements['visitors'].focus();
      return(false);
    }
  }

  //Payment program
  if (f.elements['paymentprogram'])
  {
    if (1 > f.elements['paymentprogram'].value.length)
    {
      alert("Please select a payment program");
      f.elements['paymentprogram'].focus();
      return(false);
    }
    else if (f.elements['paymentprogram'].value.length > 30)
    {
      alert("Please select a payment program");
      f.elements['paymentprogram'].focus();
      return(false);
    }
  }

  //PrimaryURLs
  if (f.elements['primaryurls'])
  {
    if (1 > f.elements['primaryurls'].value.length)
    {
      alert("At least one valid primary URL is required");
      f.elements['primaryurls'].focus();
      return(false);
    }
    else if (f.elements['primaryurls'].value.length > 400)
    {
      alert("At least one valid primary URL is required");
      f.elements['primaryurls'].focus();
      return(false);
    }
  }

  //payableto
  if (f.elements['payableto'])
  {
    if (1 > f.elements['payableto'].value.length)
    {
      alert("Filling the \"Payment payable to\" field is required");
      f.elements['payableto'].focus();
      return(false);
    }
    else if (f.elements['payableto'].value.length > 3950)
    {
      alert("Filling the \"Payment payable to\" field is required");
      f.elements['payableto'].focus();
      return(false);
    }
  }
  // gender
  if (f.elements['gender'])
  {
    if (window.RegExp)
    {
      var reg = new RegExp("[FM]","g");
      if (!reg.test(f.elements['gender'].value))
      {
        alert("Please select your gender.");
        f.elements['gender'].focus();
        return(false);
      }
    }
  }

  // birthdate
  if (f.elements['birthdate_year'] && window.RegExp)
  {
    var reg = new RegExp("^[0-9]+$","g");
    if (!reg.test(f.elements['birthdate_year'].value))
    {
      alert("Please select your birthdate.");
      f.elements['birthdate_year'].focus();
      return(false);
    }
  }
  if (f.elements['birthdate_month'] && window.RegExp)
  {
    var reg = new RegExp("^[0-9]+$","g");
    if (!reg.test(f.elements['birthdate_month'].value))
    {
      alert("Please select your birthdate.");
      f.elements['birthdate_month'].focus();
      return(false);
    }
  }
  if (f.elements['birthdate_day'] && window.RegExp)
  {
    var reg = new RegExp("^[0-9]+$","g");
    if (!reg.test(f.elements['birthdate_day'].value))
    {
      alert("Please select your birthdate.");
      f.elements['birthdate_day'].focus();
      return(false);
    }
  }

  // websites
  if (f.elements['number_of_websites'])
  {
    var i = 1;
    var error = false;
    var el;
    var reg = new RegExp('^[0-9]*$','g');

    while (i <= f.elements['number_of_websites'].value)
    {
      el = f.elements['websites['+ i +'][website]'];
      if (el.value.length > 1000)
      {
        error = 'The Website must be less than 1000 characters.';
        break;
      }

      el = f.elements['websites['+ i +'][websitetype]'];
      if (el.value.length < 1)
      {
        error = 'Please select a valid website type.';
        break;
      }

      if (window.RegExp)
      {
        el = f.elements['websites['+ i +'][hitsperday]'];
        if (!el.value.match(reg))
        {
          error = 'Visitors per day must be a number.';
          break;
        }
      }
      i++;
    }
    if (error)
    {
      alert(error);
      el.focus();
      return(false);
    }
  }
  // imcontacts

  var i = 0;
  var error = false;

  while ( i <= 3)
  {
    if (el = f.elements['imaccounts['+ i +'][imtype]'])
    {
      if (el.value.length < 1)
      {
        error = 'Please select Instant Messages type.';
        break;
      }
    }

    if (el = f.elements['imcontacts['+ i +'][imaccount]'])
    {
      if (el.value.length > 100)
      {
        error = 'Instant Messenger account Id must be less than 100 characters.';
        break;
      }
    }
    i++;
  }
  if (error)
  {
    alert(error);
    el.focus();
    return(false);
  }

  //verification text
  if (f.elements['verification_text'])
  {
    if (6 > f.elements['verification_text'].value.length )
    {
      alert("The verification text must be exactly 6 characters long.");
      f.elements['verification_text'].focus();
      return(false);
    }
  }

  // Agree
  if (f.elements['agree'].checked == false)
  {
    alert("Please read Affiliation Program Terms AND Conditions and check the box before submitting your application.");
    f.elements['agree'].focus();
    return(false);
  }

  return(true);
}